pwaller · August 5, 2014 09:33
diff --git a/btrfs-stack-traces b/btrfs-stack-traces
 [576705.255778] ------------[ cut here ]------------
 [576705.255801] WARNING: CPU: 1 PID: 13749 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [576705.255803] BTRFS: block rsv returned -28
 [576705.255804] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [576705.255834] CPU: 1 PID: 13749 Comm: kworker/u30:0 Tainted: G        W     3.15.7-031507-generic #201407281235
 [576705.255836] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [576705.255851] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [576705.255853]  0000000000001b22 ffff8801111b7958 ffffffff8176f115 0000000000000007
 [576705.255857]  ffff8801111b79a8 ffff8801111b7998 ffffffff8106ceac 0000000000000020
 [576705.255859]  ffff8801a1197440 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [576705.255863] Call Trace:
 [576705.255869]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [576705.255873]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [576705.255876]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [576705.255887]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [576705.255897]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [576705.255901]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [576705.255910]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [576705.255914]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [576705.255928]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [576705.255941]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [576705.255953]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [576705.255964]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [576705.255975]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [576705.255985]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [576705.255996]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [576705.256006]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [576705.256016]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [576705.256027]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [576705.256030]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [576705.256041]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [576705.256056]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [576705.256077]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [576705.256080]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [576705.256083]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [576705.256087]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [576705.256090]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [576705.256093]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [576705.256096]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [576705.256098] ---[ end trace 1853311c87a5cd95 ]---
 [576881.629815] ------------[ cut here ]------------
 [576881.629837] WARNING: CPU: 1 PID: 7069 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [576881.629840] BTRFS: block rsv returned -28
 [576881.629846] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [576881.629873] CPU: 1 PID: 7069 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [576881.629874] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [576881.629875]  0000000000001b22 ffff88010f5578d8 ffffffff8176f115 0000000000000007
 [576881.629878]  ffff88010f557928 ffff88010f557918 ffffffff8106ceac 000000000000024c
 [576881.629880]  ffff88018f674200 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [576881.629882] Call Trace:
 [576881.629888]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [576881.629892]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [576881.629893]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [576881.629904]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [576881.629908]  [<ffffffff8117cf99>] ? __mod_zone_page_state+0x49/0x50
 [576881.629920]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [576881.629930]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [576881.629942]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [576881.629952]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [576881.629955]  [<ffffffff811677ce>] ? free_hot_cold_page_list+0x4e/0xc0
 [576881.629965]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [576881.629974]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [576881.629982]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [576881.629990]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [576881.629998]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [576881.630001]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [576881.630009]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [576881.630017]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [576881.630026]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [576881.630034]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [576881.630036]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [576881.630038]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [576881.630040]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [576881.630042]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [576881.630044]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [576881.630047]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [576881.630050]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [576881.630052]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [576881.630055]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [576881.630056] ---[ end trace 1853311c87a5cd96 ]---
 [576939.098745] ------------[ cut here ]------------
 [576939.098767] WARNING: CPU: 1 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [576939.098769] BTRFS: block rsv returned -28
 [576939.098770] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [576939.098794] CPU: 1 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [576939.098796] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [576939.098797]  0000000000001b22 ffff880192367af8 ffffffff8176f115 0000000000000007
 [576939.098800]  ffff880192367b48 ffff880192367b38 ffffffff8106ceac ffff880192367b28
 [576939.098802]  ffff880076695000 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [576939.098804] Call Trace:
 [576939.098810]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [576939.098813]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [576939.098815]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [576939.098823]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [576939.098827]  [<ffffffff81204d70>] ? __wait_on_buffer+0x30/0x30
 [576939.098836]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [576939.098838]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [576939.098840]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [576939.098847]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [576939.098850]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [576939.098861]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [576939.098871]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [576939.098880]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [576939.098889]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [576939.098898]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [576939.098906]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [576939.098914]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [576939.098916]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [576939.098924]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [576939.098932]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [576939.098941]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [576939.098944]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [576939.098946]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [576939.098949]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [576939.098950] ---[ end trace 1853311c87a5cd97 ]---
 [577051.882490] ------------[ cut here ]------------
 [577051.882513] WARNING: CPU: 0 PID: 965 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577051.882515] BTRFS: block rsv returned -28
 [577051.882516] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577051.882547] CPU: 0 PID: 965 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [577051.882549] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577051.882550]  0000000000001b22 ffff880008fafaf8 ffffffff8176f115 0000000000000007
 [577051.882553]  ffff880008fafb48 ffff880008fafb38 ffffffff8106ceac ffff880008fafb28
 [577051.882556]  ffff8801bd858d00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577051.882560] Call Trace:
 [577051.882567]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577051.882571]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577051.882574]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577051.882585]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577051.882596]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577051.882599]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577051.882602]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577051.882611]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577051.882615]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577051.882629]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577051.882643]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577051.882655]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577051.882667]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577051.882678]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577051.882688]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577051.882698]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577051.882701]  [<ffffffff8100b1b2>] ? xen_clocksource_read+0x22/0x30
 [577051.882711]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577051.882721]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [577051.882733]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [577051.882738]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [577051.882741]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [577051.882744]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577051.882746] ---[ end trace 1853311c87a5cd98 ]---
 [577168.410198] ------------[ cut here ]------------
 [577168.410221] WARNING: CPU: 0 PID: 25856 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577168.410223] BTRFS: block rsv returned -28
 [577168.410224] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577168.410254] CPU: 0 PID: 25856 Comm: kworker/u30:6 Tainted: G        W     3.15.7-031507-generic #201407281235
 [577168.410256] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577168.410271] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [577168.410273]  0000000000001b22 ffff880042fc7958 ffffffff8176f115 0000000000000007
 [577168.410277]  ffff880042fc79a8 ffff880042fc7998 ffffffff8106ceac 000000000002b482
 [577168.410279]  ffff88012591dcc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577168.410283] Call Trace:
 [577168.410289]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577168.410293]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577168.410296]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577168.410309]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577168.410320]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577168.410324]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577168.410326]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577168.410335]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577168.410339]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577168.410353]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577168.410365]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577168.410377]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577168.410389]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577168.410399]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577168.410410]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577168.410421]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577168.410432]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577168.410442]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577168.410453]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [577168.410456]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577168.410466]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [577168.410479]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [577168.410483]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [577168.410486]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [577168.410489]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [577168.410493]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [577168.410496]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577168.410499]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [577168.410502]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577168.410504] ---[ end trace 1853311c87a5cd99 ]---
 [577240.916870] ------------[ cut here ]------------
 [577240.916893] WARNING: CPU: 0 PID: 23812 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577240.916895] BTRFS: block rsv returned -28
 [577240.916896] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577240.916927] CPU: 0 PID: 23812 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [577240.916929] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577240.916931]  0000000000001b22 ffff8801101a38d8 ffffffff8176f115 0000000000000007
 [577240.916934]  ffff8801101a3928 ffff8801101a3918 ffffffff8106ceac ffffffff00000000
 [577240.916937]  ffff8801b0b52bc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577240.916940] Call Trace:
 [577240.916948]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577240.916952]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577240.916955]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577240.916968]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577240.916982]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577240.917006]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577240.917010]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [577240.917021]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577240.917037]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577240.917051]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [577240.917065]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577240.917079]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577240.917091]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577240.917103]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577240.917115]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577240.917126]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577240.917130]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [577240.917144]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [577240.917156]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577240.917168]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577240.917180]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [577240.917191]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [577240.917195]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [577240.917199]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [577240.917205]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [577240.917210]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [577240.917214]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [577240.917218]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [577240.917223]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [577240.917227]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [577240.917230]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [577240.917234]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577240.917236] ---[ end trace 1853311c87a5cd9a ]---
 [577338.175915] ------------[ cut here ]------------
 [577338.175939] WARNING: CPU: 1 PID: 3999 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577338.175941] BTRFS: block rsv returned -28
 [577338.175942] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577338.175967] CPU: 1 PID: 3999 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [577338.175968] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577338.175970]  0000000000001b22 ffff880113983af8 ffffffff8176f115 0000000000000007
 [577338.175972]  ffff880113983b48 ffff880113983b38 ffffffff8106ceac ffff880113983b28
 [577338.175974]  ffff880124efd8c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577338.175979] Call Trace:
 [577338.175985]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577338.175989]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577338.175991]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577338.175999]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577338.176007]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577338.176010]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577338.176012]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577338.176018]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577338.176021]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577338.176032]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577338.176042]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577338.176054]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577338.176085]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577338.176100]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577338.176114]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577338.176131]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577338.176139]  [<ffffffff8100b1b2>] ? xen_clocksource_read+0x22/0x30
 [577338.176148]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577338.176158]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [577338.176169]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [577338.176175]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [577338.176178]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [577338.176182]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577338.176184] ---[ end trace 1853311c87a5cd9b ]---
 [577419.885919] ------------[ cut here ]------------
 [577419.885944] WARNING: CPU: 0 PID: 12163 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577419.885987] BTRFS: block rsv returned -28
 [577419.885989] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577419.886023] CPU: 0 PID: 12163 Comm: kworker/u30:3 Tainted: G        W     3.15.7-031507-generic #201407281235
 [577419.886025] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577419.886040] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [577419.886043]  0000000000001b22 ffff88010aff3958 ffffffff8176f115 0000000000000007
 [577419.886046]  ffff88010aff39a8 ffff88010aff3998 ffffffff8106ceac 0000000100000000
 [577419.886049]  ffff8801635342c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577419.886052] Call Trace:
 [577419.886062]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577419.886072]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577419.886075]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577419.886085]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577419.886093]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577419.886097]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577419.886098]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577419.886105]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577419.886108]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577419.886119]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577419.886129]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577419.886138]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577419.886147]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577419.886156]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577419.886164]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577419.886172]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577419.886180]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577419.886188]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577419.886197]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [577419.886199]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577419.886207]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [577419.886217]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [577419.886220]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [577419.886222]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [577419.886225]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [577419.886227]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [577419.886229]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577419.886232]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [577419.886234]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577419.886235] ---[ end trace 1853311c87a5cd9c ]---
 [577576.113105] ------------[ cut here ]------------
 [577576.113129] WARNING: CPU: 1 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577576.113131] BTRFS: block rsv returned -28
 [577576.113133] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577576.113164] CPU: 1 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [577576.113165] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577576.113167]  0000000000001b22 ffff8801923678d8 ffffffff8176f115 0000000000000007
 [577576.113170]  ffff880192367928 ffff880192367918 ffffffff8106ceac ffff880192367908
 [577576.113173]  ffff88008f937300 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577576.113176] Call Trace:
 [577576.113186]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577576.113190]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577576.113193]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577576.113205]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577576.113217]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577576.113221]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577576.113226]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [577576.113230]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577576.113233]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577576.113242]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577576.113246]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577576.113265]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577576.113280]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577576.113298]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577576.113311]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577576.113323]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577576.113335]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577576.113347]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577576.113351]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [577576.113354]  [<ffffffff816a15b0>] ? ip_finish_output+0x260/0x490
 [577576.113366]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577576.113377]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577576.113389]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [577576.113401]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [577576.113405]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [577576.113408]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [577576.113411]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [577576.113415]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [577576.113420]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [577576.113423]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [577576.113427]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [577576.113431]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [577576.113435]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [577576.113439]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577576.113441] ---[ end trace 1853311c87a5cd9d ]---
 [577712.990568] ------------[ cut here ]------------
 [577712.990591] WARNING: CPU: 1 PID: 8335 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577712.990593] BTRFS: block rsv returned -28
 [577712.990595] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577712.990625] CPU: 1 PID: 8335 Comm: flock Tainted: G        W     3.15.7-031507-generic #201407281235
 [577712.990626] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577712.990628]  0000000000001b22 ffff880116987a88 ffffffff8176f115 0000000000000007
 [577712.990632]  ffff880116987ad8 ffff880116987ac8 ffffffff8106ceac ffff880116987b78
 [577712.990634]  ffff8800cc6c7100 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577712.990638] Call Trace:
 [577712.990646]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577712.990650]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577712.990653]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577712.990668]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577712.990682]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577712.990686]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577712.990696]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577712.990701]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577712.990717]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577712.990731]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577712.990744]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577712.990756]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577712.990768]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577712.990779]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577712.990796]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577712.990811]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577712.990822]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [577712.990835]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [577712.990839]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [577712.990842]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [577712.990846]  [<ffffffff8108df84>] task_work_run+0xc4/0xe0
 [577712.990850]  [<ffffffff8106fb66>] do_exit+0x196/0x470
 [577712.990853]  [<ffffffff81021ee5>] ? syscall_trace_enter+0x165/0x280
 [577712.990856]  [<ffffffff8106fed4>] do_group_exit+0x44/0xa0
 [577712.990859]  [<ffffffff8106ff47>] SyS_exit_group+0x17/0x20
 [577712.990863]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577712.990865] ---[ end trace 1853311c87a5cd9e ]---
 [577773.838545] ------------[ cut here ]------------
 [577773.838568] WARNING: CPU: 0 PID: 25855 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577773.838570] BTRFS: block rsv returned -28
 [577773.838571] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577773.838602] CPU: 0 PID: 25855 Comm: kworker/u30:4 Tainted: G        W     3.15.7-031507-generic #201407281235
 [577773.838603] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577773.838618] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [577773.838620]  0000000000001b22 ffff88000ad37958 ffffffff8176f115 0000000000000007
 [577773.838624]  ffff88000ad379a8 ffff88000ad37998 ffffffff8106ceac 0000000000000020
 [577773.838626]  ffff880121d92980 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577773.838630] Call Trace:
 [577773.838636]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577773.838640]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577773.838643]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577773.838653]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577773.838664]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577773.838668]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577773.838670]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577773.838679]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577773.838683]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577773.838697]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577773.838710]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577773.838722]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577773.838736]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577773.838747]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577773.838757]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577773.838768]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577773.838779]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577773.838789]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577773.838800]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [577773.838803]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577773.838813]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [577773.838826]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [577773.838831]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [577773.838834]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [577773.838837]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [577773.838840]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [577773.838843]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577773.838846]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [577773.838849]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [577773.838851] ---[ end trace 1853311c87a5cd9f ]---
 [577837.369443] ------------[ cut here ]------------
 [577837.369468] WARNING: CPU: 0 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577837.369474] BTRFS: block rsv returned -28
 [577837.369476] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577837.369508] CPU: 0 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [577837.369510] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577837.369512]  0000000000001b22 ffff8801923678d8 ffffffff8176f115 0000000000000007
 [577837.369516]  ffff880192367928 ffff880192367918 ffffffff8106ceac ffff880192367908
 [577837.369519]  ffff8800a7009d40 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577837.369522] Call Trace:
 [577837.369531]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577837.369535]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577837.369538]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577837.369549]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577837.369594]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577837.369600]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [577837.369604]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [577837.369614]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577837.369630]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577837.369645]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [577837.369658]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577837.369672]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577837.369684]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577837.369695]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577837.369707]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577837.369718]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577837.369724]  [<ffffffff810ca187>] ? irq_to_desc+0x17/0x20
 [577837.369727]  [<ffffffff810cd46e>] ? irq_get_irq_data+0xe/0x10
 [577837.369739]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577837.369750]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [577837.369762]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [577837.369774]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [577837.369777]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [577837.369781]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [577837.369784]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [577837.369788]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [577837.369792]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [577837.369797]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [577837.369801]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [577837.369804]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [577837.369808]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [577837.369810] ---[ end trace 1853311c87a5cda0 ]---
 [577905.154911] ------------[ cut here ]------------
 [577905.154934] WARNING: CPU: 1 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [577905.154936] BTRFS: block rsv returned -28
 [577905.154937] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [577905.154969] CPU: 1 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [577905.154971] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [577905.154973]  0000000000001b22 ffff880192367ac8 ffffffff8176f115 0000000000000007
 [577905.154976]  ffff880192367b18 ffff880192367b08 ffffffff8106ceac ffff880192367bc0
 [577905.154980]  ffff8800a7e19cc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [577905.154983] Call Trace:
 [577905.154991]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [577905.154995]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [577905.154998]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [577905.155010]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [577905.155022]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [577905.155026]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577905.155031]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [577905.155035]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577905.155039]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577905.155049]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [577905.155052]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [577905.155068]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [577905.155083]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [577905.155097]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [577905.155110]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [577905.155122]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [577905.155134]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [577905.155146]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [577905.155150]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [577905.155153]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [577905.155165]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [577905.155177]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [577905.155190]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [577905.155194]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [577905.155197]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [577905.155201]  [<ffffffff8108df67>] task_work_run+0xa7/0xe0
 [577905.155206]  [<ffffffff81013e67>] do_notify_resume+0xc7/0xd0
 [577905.155210]  [<ffffffff8178596a>] int_signal+0x12/0x17
 [577905.155212] ---[ end trace 1853311c87a5cda1 ]---
 [578020.711566] ------------[ cut here ]------------
 [578020.711588] WARNING: CPU: 1 PID: 11957 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578020.711590] BTRFS: block rsv returned -28
 [578020.711591] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578020.711623] CPU: 1 PID: 11957 Comm: touch Tainted: G        W     3.15.7-031507-generic #201407281235
 [578020.711625] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578020.711627]  0000000000001b22 ffff880013fb79a8 ffffffff8176f115 0000000000000007
 [578020.711630]  ffff880013fb79f8 ffff880013fb79e8 ffffffff8106ceac 0000000100000000
 [578020.711633]  ffff88017c87ee40 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578020.711636] Call Trace:
 [578020.711644]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578020.711649]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578020.711651]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578020.711666]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578020.711678]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578020.711682]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578020.711685]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578020.711694]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578020.711699]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578020.711718]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578020.711737]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578020.711756]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578020.711769]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578020.711780]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578020.711791]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578020.711803]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578020.711806]  [<ffffffff811e20d3>] ? do_last+0x1e3/0x7b0
 [578020.711818]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578020.711829]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578020.711841]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578020.711853]  [<ffffffffa00fcaf2>] btrfs_setattr+0xa2/0xf0 [btrfs]
 [578020.711856]  [<ffffffff811eec74>] notify_change+0x1c4/0x3b0
 [578020.711860]  [<ffffffff81202fc7>] utimes_common+0xd7/0x1d0
 [578020.711863]  [<ffffffff812031ea>] do_utimes+0x12a/0x170
 [578020.711866]  [<ffffffff81203302>] SyS_utimensat+0x62/0x90
 [578020.711870]  [<ffffffff8178585c>] ? tracesys+0x7e/0xe6
 [578020.711873]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578020.711875] ---[ end trace 1853311c87a5cda2 ]---
 [578122.415664] ------------[ cut here ]------------
 [578122.415687] WARNING: CPU: 0 PID: 11595 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578122.415689] BTRFS: block rsv returned -28
 [578122.415691] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578122.415723] CPU: 0 PID: 11595 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [578122.415724] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578122.415726]  0000000000001b22 ffff880116aa3af8 ffffffff8176f115 0000000000000007
 [578122.415730]  ffff880116aa3b48 ffff880116aa3b38 ffffffff8106ceac ffff880116aa3b28
 [578122.415733]  ffff88003d3a1840 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578122.415736] Call Trace:
 [578122.415744]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578122.415749]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578122.415752]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578122.415764]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578122.415769]  [<ffffffff81204d70>] ? __wait_on_buffer+0x30/0x30
 [578122.415781]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578122.415784]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578122.415789]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [578122.415793]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [578122.415796]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578122.415805]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578122.415809]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578122.415824]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578122.415838]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578122.415857]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578122.415873]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578122.415885]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578122.415896]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578122.415908]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578122.415911]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578122.415922]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578122.415934]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [578122.415947]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [578122.415952]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [578122.415955]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [578122.415959]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578122.415961] ---[ end trace 1853311c87a5cda3 ]---
 [578276.174446] ------------[ cut here ]------------
 [578276.174468] WARNING: CPU: 0 PID: 7154 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578276.174470] BTRFS: block rsv returned -28
 [578276.174472] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578276.174503] CPU: 0 PID: 7154 Comm: kworker/u30:0 Tainted: G        W     3.15.7-031507-generic #201407281235
 [578276.174504] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578276.174519] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [578276.174521]  0000000000001b22 ffff88000506f958 ffffffff8176f115 0000000000000007
 [578276.174525]  ffff88000506f9a8 ffff88000506f998 ffffffff8106ceac 0000000000000000
 [578276.174528]  ffff880168a632c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578276.174531] Call Trace:
 [578276.174537]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578276.174542]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578276.174544]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578276.174555]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578276.174565]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578276.174569]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578276.174571]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578276.174580]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578276.174584]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578276.174597]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578276.174610]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578276.174623]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578276.174634]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578276.174644]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578276.174655]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578276.174665]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578276.174676]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578276.174686]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578276.174697]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [578276.174702]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [578276.174713]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [578276.174726]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [578276.174730]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [578276.174733]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [578276.174736]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [578276.174740]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [578276.174743]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [578276.174747]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [578276.174750]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [578276.174752] ---[ end trace 1853311c87a5cda4 ]---
 [578377.802310] ------------[ cut here ]------------
 [578377.802333] WARNING: CPU: 0 PID: 2286 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578377.802334] BTRFS: block rsv returned -28
 [578377.802336] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578377.802365] CPU: 0 PID: 2286 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [578377.802367] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578377.802369]  0000000000001b22 ffff8800c90cfaf8 ffffffff8176f115 0000000000000007
 [578377.802372]  ffff8800c90cfb48 ffff8800c90cfb38 ffffffff8106ceac 0000000000000000
 [578377.802375]  ffff8801e22d2940 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578377.802378] Call Trace:
 [578377.802385]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578377.802389]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578377.802392]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578377.802402]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578377.802413]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578377.802416]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578377.802419]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578377.802428]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578377.802431]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578377.802445]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578377.802458]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578377.802470]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578377.802481]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578377.802492]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578377.802502]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578377.802512]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578377.802515]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578377.802525]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578377.802535]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [578377.802547]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [578377.802551]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [578377.802554]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [578377.802557]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578377.802559] ---[ end trace 1853311c87a5cda5 ]---
 [578472.033259] ------------[ cut here ]------------
 [578472.033282] WARNING: CPU: 1 PID: 18418 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578472.033284] BTRFS: block rsv returned -28
 [578472.033285] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578472.033319] CPU: 1 PID: 18418 Comm: twsearch.py Tainted: G        W     3.15.7-031507-generic #201407281235
 [578472.033321] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578472.033323]  0000000000001b22 ffff88001009b8d8 ffffffff8176f115 0000000000000007
 [578472.033326]  ffff88001009b928 ffff88001009b918 ffffffff8106ceac ffff8801e6332580
 [578472.033329]  ffff88015d72b480 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578472.033332] Call Trace:
 [578472.033341]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578472.033345]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578472.033348]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578472.033363]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578472.033377]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578472.033381]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578472.033384]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578472.033393]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578472.033398]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578472.033413]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578472.033427]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578472.033441]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578472.033454]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578472.033466]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578472.033478]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578472.033492]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578472.033497]  [<ffffffff811c60b9>] ? memcg_check_events+0x29/0x50
 [578472.033504]  [<ffffffff8137760d>] ? cpumask_any_but+0x2d/0x40
 [578472.033520]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578472.033531]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578472.033542]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578472.033554]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [578472.033558]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [578472.033561]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [578472.033564]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [578472.033568]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [578472.033571]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [578472.033575]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [578472.033579]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [578472.033582]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [578472.033586]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578472.033588] ---[ end trace 1853311c87a5cda6 ]---
 [578619.414504] ------------[ cut here ]------------
 [578619.414528] WARNING: CPU: 0 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578619.414534] BTRFS: block rsv returned -28
 [578619.414536] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578619.414560] CPU: 0 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [578619.414561] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578619.414563]  0000000000001b22 ffff8801923678d8 ffffffff8176f115 0000000000000007
 [578619.414565]  ffff880192367928 ffff880192367918 ffffffff8106ceac ffff880192367908
 [578619.414567]  ffff8800ddf177c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578619.414569] Call Trace:
 [578619.414576]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578619.414579]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578619.414581]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578619.414592]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578619.414600]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578619.414603]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [578619.414606]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [578619.414613]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578619.414624]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578619.414634]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [578619.414644]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578619.414653]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578619.414662]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578619.414670]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578619.414678]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578619.414686]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578619.414689]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [578619.414698]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [578619.414707]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578619.414715]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578619.414723]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578619.414731]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [578619.414734]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [578619.414736]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [578619.414738]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [578619.414740]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [578619.414743]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [578619.414746]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [578619.414748]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [578619.414751]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [578619.414753]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578619.414755] ---[ end trace 1853311c87a5cda7 ]---
 [578756.818437] ------------[ cut here ]------------
 [578756.818460] WARNING: CPU: 0 PID: 21048 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578756.818462] BTRFS: block rsv returned -28
 [578756.818464] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578756.818493] CPU: 0 PID: 21048 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [578756.818495] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578756.818497]  0000000000001b22 ffff8801049a78d8 ffffffff8176f115 0000000000000007
 [578756.818500]  ffff8801049a7928 ffff8801049a7918 ffffffff8106ceac 0000000000000001
 [578756.818503]  ffff88007ff46800 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578756.818506] Call Trace:
 [578756.818513]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578756.818518]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578756.818521]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578756.818532]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578756.818543]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578756.818547]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [578756.818552]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [578756.818560]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578756.818576]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578756.818590]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [578756.818604]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578756.818617]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578756.818632]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578756.818644]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578756.818657]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578756.818689]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578756.818693]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [578756.818706]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [578756.818727]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578756.818738]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578756.818751]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578756.818762]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [578756.818765]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [578756.818769]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [578756.818771]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [578756.818775]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [578756.818779]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [578756.818782]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [578756.818787]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [578756.818790]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [578756.818794]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [578756.818798]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578756.818800] ---[ end trace 1853311c87a5cda8 ]---
 [578820.693876] ------------[ cut here ]------------
 [578820.693894] WARNING: CPU: 0 PID: 21048 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578820.693896] BTRFS: block rsv returned -28
 [578820.693897] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578820.693919] CPU: 0 PID: 21048 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [578820.693920] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578820.693921]  0000000000001b22 ffff8801049a78d8 ffffffff8176f115 0000000000000007
 [578820.693923]  ffff8801049a7928 ffff8801049a7918 ffffffff8106ceac ffffffffa01aa000
 [578820.693925]  ffff8801ce603b40 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578820.693928] Call Trace:
 [578820.693934]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578820.693938]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578820.693940]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578820.693948]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578820.693951]  [<ffffffff8117cf99>] ? __mod_zone_page_state+0x49/0x50
 [578820.693959]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578820.693966]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578820.693978]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578820.693988]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [578820.693998]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578820.694007]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578820.694016]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578820.694025]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578820.694032]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578820.694041]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578820.694043]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [578820.694053]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [578820.694062]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578820.694070]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578820.694078]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578820.694086]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [578820.694089]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [578820.694091]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [578820.694093]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [578820.694095]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [578820.694098]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [578820.694101]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [578820.694104]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [578820.694106]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [578820.694109]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [578820.694111]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578820.694113] ---[ end trace 1853311c87a5cda9 ]---
 [578928.820111] ------------[ cut here ]------------
 [578928.820135] WARNING: CPU: 1 PID: 21048 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [578928.820137] BTRFS: block rsv returned -28
 [578928.820138] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [578928.820170] CPU: 1 PID: 21048 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [578928.820172] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [578928.820174]  0000000000001b22 ffff8801049a78d8 ffffffff8176f115 0000000000000007
 [578928.820177]  ffff8801049a7928 ffff8801049a7918 ffffffff8106ceac 0000000100000000
 [578928.820181]  ffff88007c71bbc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [578928.820184] Call Trace:
 [578928.820192]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [578928.820196]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [578928.820199]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [578928.820211]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [578928.820222]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [578928.820226]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578928.820230]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [578928.820234]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [578928.820236]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [578928.820245]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [578928.820249]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [578928.820264]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [578928.820279]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [578928.820293]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [578928.820305]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [578928.820317]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [578928.820328]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [578928.820339]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [578928.820343]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [578928.820356]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [578928.820368]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [578928.820380]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [578928.820392]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [578928.820403]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [578928.820410]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [578928.820413]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [578928.820416]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [578928.820420]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [578928.820424]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [578928.820427]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [578928.820432]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [578928.820436]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [578928.820439]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [578928.820443]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [578928.820446] ---[ end trace 1853311c87a5cdaa ]---
 [579000.989318] ------------[ cut here ]------------
 [579000.989340] WARNING: CPU: 1 PID: 21048 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579000.989342] BTRFS: block rsv returned -28
 [579000.989343] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579000.989365] CPU: 1 PID: 21048 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [579000.989366] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579000.989368]  0000000000001b22 ffff8801049a78d8 ffffffff8176f115 0000000000000007
 [579000.989370]  ffff8801049a7928 ffff8801049a7918 ffffffff8106ceac 0000000100000000
 [579000.989372]  ffff8800a3e5ccc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579000.989374] Call Trace:
 [579000.989380]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579000.989384]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579000.989386]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579000.989394]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579000.989402]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579000.989405]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579000.989407]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579000.989413]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579000.989417]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579000.989428]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579000.989438]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579000.989447]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579000.989456]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579000.989465]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579000.989473]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579000.989481]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579000.989483]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579000.989493]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [579000.989502]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579000.989510]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579000.989519]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579000.989527]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579000.989529]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579000.989532]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579000.989534]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579000.989536]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579000.989539]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579000.989541]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579000.989544]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579000.989547]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579000.989549]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579000.989552]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579000.989554] ---[ end trace 1853311c87a5cdab ]---
 [579125.532471] ------------[ cut here ]------------
 [579125.532495] WARNING: CPU: 1 PID: 21048 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579125.532496] BTRFS: block rsv returned -28
 [579125.532498] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579125.532530] CPU: 1 PID: 21048 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [579125.532532] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579125.532534]  0000000000001b22 ffff8801049a78d8 ffffffff8176f115 0000000000000007
 [579125.532537]  ffff8801049a7928 ffff8801049a7918 ffffffff8106ceac ffff8801049a7938
 [579125.532541]  ffff880094d0ecc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579125.532544] Call Trace:
 [579125.532552]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579125.532557]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579125.532559]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579125.532571]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579125.532582]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579125.532587]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [579125.532591]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [579125.532601]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579125.532616]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579125.532630]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [579125.532644]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579125.532657]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579125.532670]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579125.532681]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579125.532693]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579125.532704]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579125.532707]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579125.532721]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [579125.532733]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579125.532744]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579125.532756]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579125.532767]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579125.532770]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579125.532774]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579125.532777]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579125.532780]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579125.532784]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579125.532787]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579125.532791]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579125.532795]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579125.532798]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579125.532802]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579125.532804] ---[ end trace 1853311c87a5cdac ]---
 [579276.573440] ------------[ cut here ]------------
 [579276.573458] WARNING: CPU: 1 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579276.573460] BTRFS: block rsv returned -28
 [579276.573461] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579276.573483] CPU: 1 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [579276.573484] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579276.573485]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [579276.573488]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [579276.573490]  ffff880061fd7b80 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579276.573492] Call Trace:
 [579276.573498]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579276.573502]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579276.573504]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579276.573512]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579276.573520]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579276.573524]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [579276.573529]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [579276.573538]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579276.573553]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579276.573563]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579276.573573]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579276.573582]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579276.573590]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579276.573598]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579276.573607]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579276.573609]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579276.573617]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579276.573626]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579276.573634]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579276.573642]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579276.573645]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579276.573647]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579276.573649]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579276.573652]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579276.573655]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579276.573657]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579276.573660]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579276.573663]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579276.573665]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579276.573668]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579276.573670] ---[ end trace 1853311c87a5cdad ]---
 [579343.031460] ------------[ cut here ]------------
 [579343.031483] WARNING: CPU: 1 PID: 27681 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579343.031485] BTRFS: block rsv returned -28
 [579343.031486] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579343.031518] CPU: 1 PID: 27681 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [579343.031520] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579343.031522]  0000000000001b22 ffff880002453af8 ffffffff8176f115 0000000000000007
 [579343.031526]  ffff880002453b48 ffff880002453b38 ffffffff8106ceac ffff8801efc34580
 [579343.031528]  ffff88005fa79600 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579343.031532] Call Trace:
 [579343.031540]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579343.031544]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579343.031547]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579343.031559]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579343.031570]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579343.031574]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579343.031583]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579343.031587]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579343.031603]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579343.031618]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579343.031632]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579343.031644]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579343.031656]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579343.031668]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579343.031681]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579343.031692]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579343.031703]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [579343.031716]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [579343.031721]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [579343.031725]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [579343.031728]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579343.031730] ---[ end trace 1853311c87a5cdae ]---
 [579438.841014] ------------[ cut here ]------------
 [579438.841035] WARNING: CPU: 0 PID: 29459 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579438.841037] BTRFS: block rsv returned -28
 [579438.841038] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579438.841068] CPU: 0 PID: 29459 Comm: flock Tainted: G        W     3.15.7-031507-generic #201407281235
 [579438.841070] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579438.841072]  0000000000001b22 ffff88010a61fa88 ffffffff8176f115 0000000000000007
 [579438.841075]  ffff88010a61fad8 ffff88010a61fac8 ffffffff8106ceac 0000000100000000
 [579438.841078]  ffff88009d9cf4c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579438.841081] Call Trace:
 [579438.841089]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579438.841093]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579438.841095]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579438.841106]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579438.841117]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579438.841120]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579438.841123]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579438.841132]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579438.841135]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579438.841149]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579438.841162]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579438.841175]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579438.841186]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579438.841196]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579438.841207]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579438.841217]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579438.841228]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579438.841238]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [579438.841250]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [579438.841254]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [579438.841256]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [579438.841261]  [<ffffffff8108df84>] task_work_run+0xc4/0xe0
 [579438.841264]  [<ffffffff8106fb66>] do_exit+0x196/0x470
 [579438.841267]  [<ffffffff81021ee5>] ? syscall_trace_enter+0x165/0x280
 [579438.841270]  [<ffffffff8106fed4>] do_group_exit+0x44/0xa0
 [579438.841272]  [<ffffffff8106ff47>] SyS_exit_group+0x17/0x20
 [579438.841276]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579438.841278] ---[ end trace 1853311c87a5cdaf ]---
 [579503.004193] ------------[ cut here ]------------
 [579503.004215] WARNING: CPU: 1 PID: 5987 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579503.004217] BTRFS: block rsv returned -28
 [579503.004218] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579503.004249] CPU: 1 PID: 5987 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [579503.004251] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579503.004253]  0000000000001b22 ffff880100467af8 ffffffff8176f115 0000000000000007
 [579503.004256]  ffff880100467b48 ffff880100467b38 ffffffff8106ceac ffff880100467b28
 [579503.004259]  ffff88016da391c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579503.004262] Call Trace:
 [579503.004270]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579503.004275]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579503.004278]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579503.004288]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579503.004298]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579503.004302]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579503.004311]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579503.004315]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579503.004329]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579503.004341]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579503.004354]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579503.004365]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579503.004375]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579503.004386]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579503.004396]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579503.004399]  [<ffffffff8100b1b2>] ? xen_clocksource_read+0x22/0x30
 [579503.004409]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579503.004420]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [579503.004431]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [579503.004436]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [579503.004439]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [579503.004442]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579503.004444] ---[ end trace 1853311c87a5cdb0 ]---
 [579585.345307] ------------[ cut here ]------------
 [579585.345330] WARNING: CPU: 0 PID: 30470 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579585.345332] BTRFS: block rsv returned -28
 [579585.345334] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579585.345364] CPU: 0 PID: 30470 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [579585.345366] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579585.345368]  0000000000001b22 ffff880100e3f8d8 ffffffff8176f115 0000000000000007
 [579585.345371]  ffff880100e3f928 ffff880100e3f918 ffffffff8106ceac ffff880100e3f938
 [579585.345374]  ffff880063f00f40 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579585.345377] Call Trace:
 [579585.345385]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579585.345389]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579585.345392]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579585.345402]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579585.345413]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579585.345417]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579585.345419]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579585.345428]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579585.345432]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579585.345446]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579585.345459]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579585.345472]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579585.345484]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579585.345494]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579585.345505]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579585.345516]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579585.345518]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579585.345523]  [<ffffffff811c88c1>] ? mem_cgroup_try_charge+0x161/0x230
 [579585.345534]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579585.345544]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579585.345555]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579585.345565]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579585.345568]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579585.345571]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579585.345574]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579585.345577]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579585.345581]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579585.345584]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579585.345587]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579585.345591]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579585.345594]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579585.345597]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579585.345599] ---[ end trace 1853311c87a5cdb1 ]---
 [579640.993241] ------------[ cut here ]------------
 [579640.993264] WARNING: CPU: 1 PID: 23053 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579640.993267] BTRFS: block rsv returned -28
 [579640.993268] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579640.993299] CPU: 1 PID: 23053 Comm: php Tainted: G        W     3.15.7-031507-generic #201407281235
 [579640.993300] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579640.993302]  0000000000001b22 ffff880192367ac8 ffffffff8176f115 0000000000000007
 [579640.993305]  ffff880192367b18 ffff880192367b08 ffffffff8106ceac 0000000100000000
 [579640.993308]  ffff880094c01600 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579640.993311] Call Trace:
 [579640.993320]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579640.993325]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579640.993328]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579640.993341]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579640.993352]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579640.993356]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579640.993361]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [579640.993365]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [579640.993368]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579640.993378]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579640.993382]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579640.993397]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579640.993412]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579640.993426]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579640.993439]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579640.993450]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579640.993462]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579640.993474]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579640.993477]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [579640.993480]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579640.993492]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579640.993503]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [579640.993516]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [579640.993520]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [579640.993523]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [579640.993528]  [<ffffffff8108df67>] task_work_run+0xa7/0xe0
 [579640.993532]  [<ffffffff81013e67>] do_notify_resume+0xc7/0xd0
 [579640.993537]  [<ffffffff8178596a>] int_signal+0x12/0x17
 [579640.993539] ---[ end trace 1853311c87a5cdb2 ]---
 [579708.964184] ------------[ cut here ]------------
 [579708.964202] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579708.964204] BTRFS: block rsv returned -28
 [579708.964205] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579708.964226] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [579708.964228] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579708.964229]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [579708.964231]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff8801e4472780
 [579708.964233]  ffff88003f772040 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579708.964236] Call Trace:
 [579708.964242]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579708.964246]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579708.964251]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579708.964259]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579708.964267]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579708.964271]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [579708.964274]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [579708.964281]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579708.964293]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579708.964303]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579708.964313]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579708.964322]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579708.964330]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579708.964338]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579708.964346]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579708.964349]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579708.964357]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579708.964365]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579708.964374]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579708.964382]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579708.964384]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579708.964387]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579708.964389]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579708.964391]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579708.964394]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579708.964396]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579708.964399]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579708.964402]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579708.964404]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579708.964407]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579708.964408] ---[ end trace 1853311c87a5cdb3 ]---
 [579784.836556] ------------[ cut here ]------------
 [579784.836578] WARNING: CPU: 1 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579784.836580] BTRFS: block rsv returned -28
 [579784.836582] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579784.836614] CPU: 1 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [579784.836616] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579784.836618]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [579784.836622]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [579784.836625]  ffff8800c7ac4400 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579784.836628] Call Trace:
 [579784.836636]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579784.836640]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579784.836643]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579784.836654]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579784.836666]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579784.836671]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [579784.836675]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [579784.836685]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579784.836701]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579784.836715]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579784.836728]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579784.836740]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579784.836751]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579784.836763]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579784.836774]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579784.836777]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579784.836788]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579784.836800]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579784.836811]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579784.836823]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579784.836826]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579784.836830]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579784.836833]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579784.836836]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579784.836840]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579784.836844]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579784.836848]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579784.836852]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579784.836856]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579784.836859]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579784.836861] ---[ end trace 1853311c87a5cdb4 ]---
 [579927.310324] ------------[ cut here ]------------
 [579927.310346] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579927.310349] BTRFS: block rsv returned -28
 [579927.310350] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579927.310373] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [579927.310374] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579927.310376]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [579927.310378]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [579927.310380]  ffff88015700f840 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579927.310382] Call Trace:
 [579927.310389]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579927.310392]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579927.310394]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579927.310403]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579927.310411]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579927.310414]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579927.310416]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [579927.310423]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579927.310426]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [579927.310438]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579927.310448]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579927.310457]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579927.310466]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579927.310474]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579927.310482]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579927.310490]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579927.310493]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579927.310501]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579927.310509]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579927.310517]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579927.310525]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579927.310528]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579927.310530]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579927.310532]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579927.310535]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579927.310538]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579927.310540]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579927.310544]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579927.310546]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579927.310549]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579927.310551]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579927.310553] ---[ end trace 1853311c87a5cdb5 ]---
 [579997.589412] ------------[ cut here ]------------
 [579997.589431] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [579997.589432] BTRFS: block rsv returned -28
 [579997.589433] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [579997.589456] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [579997.589457] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [579997.589458]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [579997.589460]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [579997.589463]  ffff880174608500 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [579997.589465] Call Trace:
 [579997.589471]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [579997.589475]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [579997.589476]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [579997.589485]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [579997.589493]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [579997.589497]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [579997.589500]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [579997.589507]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [579997.589518]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [579997.589528]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [579997.589538]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [579997.589547]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [579997.589555]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [579997.589563]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [579997.589572]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [579997.589574]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [579997.589582]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [579997.589590]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [579997.589599]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [579997.589607]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [579997.589609]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [579997.589612]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [579997.589614]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [579997.589616]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [579997.589620]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [579997.589622]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [579997.589625]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [579997.589628]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [579997.589630]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [579997.589632]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [579997.589634] ---[ end trace 1853311c87a5cdb6 ]---
 [580145.691306] ------------[ cut here ]------------
 [580145.691329] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580145.691348] BTRFS: block rsv returned -28
 [580145.691350] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580145.691411] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [580145.691413] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580145.691415]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [580145.691418]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [580145.691421]  ffff88015d6a5680 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580145.691425] Call Trace:
 [580145.691433]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580145.691437]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580145.691440]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580145.691452]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580145.691463]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580145.691473]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580145.691488]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580145.691502]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580145.691515]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580145.691528]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580145.691539]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580145.691551]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580145.691563]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580145.691566]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [580145.691577]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580145.691592]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580145.691604]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [580145.691615]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [580145.691619]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [580145.691622]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [580145.691625]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [580145.691628]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [580145.691632]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580145.691635]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [580145.691639]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [580145.691643]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [580145.691646]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [580145.691650]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580145.691652] ---[ end trace 1853311c87a5cdb7 ]---
 [580240.342901] ------------[ cut here ]------------
 [580240.342924] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580240.342926] BTRFS: block rsv returned -28
 [580240.342927] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580240.342960] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [580240.342962] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580240.342964]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [580240.342967]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac 0000000100000000
 [580240.342971]  ffff8801b0251ec0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580240.342974] Call Trace:
 [580240.342982]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580240.342987]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580240.342990]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580240.343001]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580240.343013]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580240.343017]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580240.343020]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580240.343030]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580240.343034]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [580240.343049]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580240.343063]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580240.343077]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580240.343089]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580240.343100]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580240.343112]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580240.343123]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580240.343127]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [580240.343139]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580240.343150]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580240.343162]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [580240.343173]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [580240.343177]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [580240.343180]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [580240.343183]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [580240.343187]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [580240.343192]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [580240.343195]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [580240.343200]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [580240.343204]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [580240.343208]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [580240.343214]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580240.343217] ---[ end trace 1853311c87a5cdb8 ]---
 [580416.397358] ------------[ cut here ]------------
 [580416.397376] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580416.397378] BTRFS: block rsv returned -28
 [580416.397379] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580416.397401] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [580416.397402] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580416.397403]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [580416.397406]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [580416.397429]  ffff88008e404040 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580416.397443] Call Trace:
 [580416.397458]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580416.397461]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580416.397463]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580416.397472]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580416.397480]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580416.397484]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [580416.397487]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [580416.397493]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580416.397504]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580416.397514]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580416.397523]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580416.397533]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580416.397541]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580416.397549]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580416.397557]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580416.397560]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [580416.397569]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580416.397585]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580416.397594]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [580416.397602]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [580416.397605]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [580416.397607]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [580416.397609]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [580416.397611]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [580416.397615]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [580416.397617]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [580416.397620]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [580416.397623]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [580416.397625]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [580416.397628]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580416.397629] ---[ end trace 1853311c87a5cdb9 ]---
 [580481.062704] ------------[ cut here ]------------
 [580481.062726] WARNING: CPU: 1 PID: 3727 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580481.062728] BTRFS: block rsv returned -28
 [580481.062730] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580481.062760] CPU: 1 PID: 3727 Comm: kworker/u30:4 Tainted: G        W     3.15.7-031507-generic #201407281235
 [580481.062762] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580481.062777] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [580481.062779]  0000000000001b22 ffff88010c27f958 ffffffff8176f115 0000000000000007
 [580481.062782]  ffff88010c27f9a8 ffff88010c27f998 ffffffff8106ceac 0000000000000b38
 [580481.062785]  ffff88018b74dfc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580481.062789] Call Trace:
 [580481.062795]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580481.062799]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580481.062802]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580481.062812]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580481.062825]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580481.062829]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580481.062838]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580481.062842]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [580481.062856]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580481.062868]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580481.062880]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580481.062891]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580481.062902]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580481.062912]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580481.062923]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580481.062933]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580481.062943]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580481.062955]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [580481.062958]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [580481.062968]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [580481.062981]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [580481.062985]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [580481.062988]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [580481.062991]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [580481.062994]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [580481.062997]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580481.063000]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [580481.063003]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580481.063005] ---[ end trace 1853311c87a5cdba ]---
 [580602.079979] ------------[ cut here ]------------
 [580602.080001] WARNING: CPU: 1 PID: 14610 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580602.080003] BTRFS: block rsv returned -28
 [580602.080004] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580602.080034] CPU: 1 PID: 14610 Comm: kworker/u30:5 Tainted: G        W     3.15.7-031507-generic #201407281235
 [580602.080036] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580602.080051] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [580602.080053]  0000000000001b22 ffff8801170cb958 ffffffff8176f115 0000000000000007
 [580602.080056]  ffff8801170cb9a8 ffff8801170cb998 ffffffff8106ceac 0000000000000020
 [580602.080059]  ffff880172f61b00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580602.080062] Call Trace:
 [580602.080070]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580602.080075]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580602.080077]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580602.080088]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580602.080098]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580602.080102]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580602.080111]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580602.080134]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [580602.080148]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580602.080161]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580602.080173]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580602.080184]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580602.080195]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580602.080205]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580602.080216]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580602.080227]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580602.080237]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580602.080248]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [580602.080251]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [580602.080262]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [580602.080275]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [580602.080279]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [580602.080282]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [580602.080285]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [580602.080288]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [580602.080291]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580602.080295]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [580602.080298]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580602.080300] ---[ end trace 1853311c87a5cdbb ]---
 [580667.744924] ------------[ cut here ]------------
 [580667.744946] WARNING: CPU: 0 PID: 8290 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580667.744948] BTRFS: block rsv returned -28
 [580667.744950] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580667.744973] CPU: 0 PID: 8290 Comm: flock Tainted: G        W     3.15.7-031507-generic #201407281235
 [580667.744975] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580667.744976]  0000000000001b22 ffff880109dc7a88 ffffffff8176f115 0000000000000007
 [580667.744978]  ffff880109dc7ad8 ffff880109dc7ac8 ffffffff8106ceac ffff880109dc7b78
 [580667.744980]  ffff8801365544c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580667.744983] Call Trace:
 [580667.744990]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580667.744993]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580667.744995]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580667.745003]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580667.745012]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580667.745014]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580667.745016]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580667.745023]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580667.745026]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [580667.745037]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580667.745046]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580667.745056]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580667.745065]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580667.745073]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580667.745081]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580667.745089]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580667.745097]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580667.745106]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [580667.745115]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [580667.745117]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [580667.745119]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [580667.745122]  [<ffffffff8108df84>] task_work_run+0xc4/0xe0
 [580667.745124]  [<ffffffff8106fb66>] do_exit+0x196/0x470
 [580667.745127]  [<ffffffff81021ee5>] ? syscall_trace_enter+0x165/0x280
 [580667.745129]  [<ffffffff8106fed4>] do_group_exit+0x44/0xa0
 [580667.745131]  [<ffffffff8106ff47>] SyS_exit_group+0x17/0x20
 [580667.745133]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580667.745135] ---[ end trace 1853311c87a5cdbc ]---
 [580779.639860] ------------[ cut here ]------------
 [580779.639883] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580779.639886] BTRFS: block rsv returned -28
 [580779.639887] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580779.639920] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [580779.639922] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580779.639924]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [580779.639928]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [580779.639931]  ffff88001b1353c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580779.639934] Call Trace:
 [580779.639942]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580779.639946]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580779.639949]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580779.639961]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580779.639974]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580779.640002]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [580779.640006]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [580779.640017]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580779.640032]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580779.640046]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580779.640063]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580779.640091]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580779.640103]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580779.640114]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580779.640126]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580779.640129]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [580779.640141]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580779.640154]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580779.640185]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [580779.640197]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [580779.640201]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [580779.640204]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [580779.640207]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [580779.640211]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [580779.640216]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [580779.640220]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [580779.640226]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [580779.640246]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [580779.640250]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [580779.640254]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580779.640256] ---[ end trace 1853311c87a5cdbd ]---
 [580857.006046] ------------[ cut here ]------------
 [580857.006069] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580857.006071] BTRFS: block rsv returned -28
 [580857.006073] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580857.006131] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [580857.006133] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580857.006135]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [580857.006170]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [580857.006173]  ffff88017da77080 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580857.006177] Call Trace:
 [580857.006187]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580857.006244]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580857.006247]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580857.006260]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580857.006272]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580857.006277]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [580857.006281]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [580857.006291]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580857.006307]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580857.006322]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580857.006337]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580857.006350]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580857.006362]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580857.006374]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580857.006387]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580857.006390]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [580857.006402]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580857.006413]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580857.006425]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [580857.006438]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [580857.006465]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [580857.006469]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [580857.006472]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [580857.006476]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [580857.006480]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [580857.006484]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [580857.006488]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [580857.006492]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [580857.006496]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [580857.006500]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [580857.006502] ---[ end trace 1853311c87a5cdbe ]---
 [580915.436444] ------------[ cut here ]------------
 [580915.436466] WARNING: CPU: 1 PID: 3711 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [580915.436469] BTRFS: block rsv returned -28
 [580915.436470] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [580915.436500] CPU: 1 PID: 3711 Comm: kworker/u30:2 Tainted: G        W     3.15.7-031507-generic #201407281235
 [580915.436502] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [580915.436517] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [580915.436519]  0000000000001b22 ffff880105ab7958 ffffffff8176f115 0000000000000007
 [580915.436523]  ffff880105ab79a8 ffff880105ab7998 ffffffff8106ceac 0000000100000000
 [580915.436526]  ffff88008cd75900 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [580915.436529] Call Trace:
 [580915.436537]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [580915.436542]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [580915.436545]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [580915.436557]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [580915.436568]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [580915.436572]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580915.436575]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [580915.436585]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [580915.436589]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [580915.436605]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [580915.436619]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [580915.436634]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [580915.436647]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [580915.436658]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [580915.436669]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [580915.436681]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [580915.436693]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [580915.436705]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [580915.436718]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [580915.436722]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [580915.436733]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [580915.436746]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [580915.436751]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [580915.436754]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [580915.436758]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [580915.436762]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [580915.436765]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580915.436769]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [580915.436771]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [580915.436773] ---[ end trace 1853311c87a5cdbf ]---
 [581013.599246] ------------[ cut here ]------------
 [581013.599268] WARNING: CPU: 0 PID: 10399 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581013.599270] BTRFS: block rsv returned -28
 [581013.599272] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581013.599299] CPU: 0 PID: 10399 Comm: kworker/u30:7 Tainted: G        W     3.15.7-031507-generic #201407281235
 [581013.599300] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581013.599312] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [581013.599314]  0000000000001b22 ffff880100faf958 ffffffff8176f115 0000000000000007
 [581013.599316]  ffff880100faf9a8 ffff880100faf998 ffffffff8106ceac 0000000000000b05
 [581013.599318]  ffff8800543f54c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581013.599321] Call Trace:
 [581013.599326]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581013.599329]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581013.599331]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581013.599339]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581013.599348]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581013.599351]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581013.599352]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581013.599359]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581013.599362]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581013.599373]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581013.599383]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581013.599392]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581013.599401]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581013.599409]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581013.599418]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581013.599426]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581013.599434]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581013.599442]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581013.599451]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [581013.599453]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [581013.599461]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [581013.599471]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [581013.599474]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [581013.599477]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [581013.599479]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [581013.599482]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [581013.599485]  [<ffffffff8109bda6>] ? finish_task_switch+0x56/0x180
 [581013.599487]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581013.599490]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [581013.599492]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581013.599494] ---[ end trace 1853311c87a5cdc0 ]---
 [581073.321777] ------------[ cut here ]------------
 [581073.321797] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581073.321798] BTRFS: block rsv returned -28
 [581073.321799] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581073.321837] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [581073.321838] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581073.321840]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [581073.321842]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac 0000000000000002
 [581073.321844]  ffff8800d8576980 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581073.321846] Call Trace:
 [581073.321854]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581073.321857]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581073.321859]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581073.321867]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581073.321876]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581073.321880]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [581073.321883]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [581073.321890]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581073.321901]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581073.321911]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581073.321920]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581073.321929]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581073.321938]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581073.321946]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581073.321954]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581073.321957]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [581073.321965]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581073.321973]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581073.321982]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [581073.321990]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [581073.321993]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [581073.321995]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [581073.321997]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [581073.322000]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [581073.322003]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [581073.322005]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [581073.322008]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [581073.322011]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [581073.322013]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [581073.322016]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581073.322017] ---[ end trace 1853311c87a5cdc1 ]---
 [581217.605901] ------------[ cut here ]------------
 [581217.605922] WARNING: CPU: 0 PID: 26550 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581217.605938] BTRFS: block rsv returned -28
 [581217.605939] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581217.605961] CPU: 0 PID: 26550 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [581217.605963] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581217.605964]  0000000000001b22 ffff880101aef8d8 ffffffff8176f115 0000000000000007
 [581217.605967]  ffff880101aef928 ffff880101aef918 ffffffff8106ceac ffff880101aef8e8
 [581217.605969]  ffff88018b74dfc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581217.605971] Call Trace:
 [581217.605977]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581217.605981]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581217.605982]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581217.605991]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581217.606000]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581217.606022]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [581217.606025]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [581217.606033]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581217.606045]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581217.606069]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581217.606078]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581217.606087]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581217.606095]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581217.606103]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581217.606111]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581217.606114]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [581217.606122]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581217.606130]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581217.606139]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [581217.606147]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [581217.606149]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [581217.606152]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [581217.606153]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [581217.606156]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [581217.606159]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [581217.606161]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [581217.606164]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [581217.606167]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [581217.606169]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [581217.606172]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581217.606173] ---[ end trace 1853311c87a5cdc2 ]---
 [581294.085608] ------------[ cut here ]------------
 [581294.085633] WARNING: CPU: 0 PID: 17926 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581294.085635] BTRFS: block rsv returned -28
 [581294.085637] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581294.085667] CPU: 0 PID: 17926 Comm: flock Tainted: G        W     3.15.7-031507-generic #201407281235
 [581294.085669] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581294.085671]  0000000000001b22 ffff88010bf77a88 ffffffff8176f115 0000000000000007
 [581294.085674]  ffff88010bf77ad8 ffff88010bf77ac8 ffffffff8106ceac 0000000000000003
 [581294.085677]  ffff8801e13af180 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581294.085680] Call Trace:
 [581294.085689]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581294.085693]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581294.085696]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581294.085708]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581294.085719]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581294.085724]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581294.085729]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [581294.085733]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [581294.085735]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581294.085745]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581294.085748]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581294.085764]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581294.085778]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581294.085794]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581294.085808]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581294.085820]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581294.085831]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581294.085843]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581294.085854]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581294.085865]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [581294.085878]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [581294.085882]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [581294.085884]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [581294.085889]  [<ffffffff8108df84>] task_work_run+0xc4/0xe0
 [581294.085892]  [<ffffffff8106fb66>] do_exit+0x196/0x470
 [581294.085896]  [<ffffffff81021ee5>] ? syscall_trace_enter+0x165/0x280
 [581294.085898]  [<ffffffff8106fed4>] do_group_exit+0x44/0xa0
 [581294.085901]  [<ffffffff8106ff47>] SyS_exit_group+0x17/0x20
 [581294.085905]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581294.085907] ---[ end trace 1853311c87a5cdc3 ]---
 [581519.042994] ------------[ cut here ]------------
 [581519.043013] WARNING: CPU: 1 PID: 1923 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581519.043014] BTRFS: block rsv returned -28
 [581519.043015] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581519.043037] CPU: 1 PID: 1923 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [581519.043038] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581519.043040]  0000000000001b22 ffff8801161478d8 ffffffff8176f115 0000000000000007
 [581519.043042]  ffff880116147928 ffff880116147918 ffffffff8106ceac ffffffffa01aa000
 [581519.043044]  ffff8800d8788240 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581519.043047] Call Trace:
 [581519.043053]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581519.043057]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581519.043059]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581519.043067]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581519.043075]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581519.043079]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [581519.043083]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [581519.043089]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581519.043101]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581519.043111]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [581519.043122]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581519.043131]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581519.043140]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581519.043148]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581519.043156]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581519.043165]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581519.043167]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [581519.043177]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [581519.043186]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581519.043194]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581519.043202]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [581519.043210]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [581519.043213]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [581519.043216]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [581519.043217]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [581519.043220]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [581519.043223]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [581519.043225]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [581519.043228]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [581519.043231]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [581519.043233]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [581519.043236]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581519.043237] ---[ end trace 1853311c87a5cdc4 ]---
 [581590.285757] ------------[ cut here ]------------
 [581590.285780] WARNING: CPU: 1 PID: 21774 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581590.285782] BTRFS: block rsv returned -28
 [581590.285783] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581590.285814] CPU: 1 PID: 21774 Comm: pam_script_ses_ Tainted: G        W     3.15.7-031507-generic #201407281235
 [581590.285816] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581590.285818]  0000000000001b22 ffff8800d014f9d8 ffffffff8176f115 0000000000000007
 [581590.285821]  ffff8800d014fa28 ffff8800d014fa18 ffffffff8106ceac 000000d0efc378d8
 [581590.285824]  ffff88003d5de3c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581590.285828] Call Trace:
 [581590.285837]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581590.285842]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581590.285845]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581590.285856]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581590.285868]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581590.285872]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581590.285875]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581590.285885]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581590.285889]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581590.285904]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581590.285918]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581590.285932]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581590.285945]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581590.285956]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581590.285968]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581590.285980]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581590.285985]  [<ffffffff8132c197>] ? apparmor_capable+0x27/0x80
 [581590.285999]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581590.286010]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581590.286021]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [581590.286033]  [<ffffffffa00fcaf2>] btrfs_setattr+0xa2/0xf0 [btrfs]
 [581590.286037]  [<ffffffff811eec74>] notify_change+0x1c4/0x3b0
 [581590.286042]  [<ffffffff811dde96>] ? final_putname+0x26/0x50
 [581590.286046]  [<ffffffff811d088d>] chown_common+0x16d/0x1a0
 [581590.286051]  [<ffffffff811f2b08>] ? __mnt_want_write+0x58/0x70
 [581590.286054]  [<ffffffff811d1a8f>] SyS_fchownat+0xbf/0x100
 [581590.286057]  [<ffffffff811d1aed>] SyS_chown+0x1d/0x20
 [581590.286061]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581590.286063] ---[ end trace 1853311c87a5cdc5 ]---
 [581674.155206] ------------[ cut here ]------------
 [581674.155229] WARNING: CPU: 0 PID: 21594 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581674.155230] BTRFS: block rsv returned -28
 [581674.155231] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581674.155254] CPU: 0 PID: 21594 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [581674.155255] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581674.155256]  0000000000001b22 ffff88002791faf8 ffffffff8176f115 0000000000000007
 [581674.155258]  ffff88002791fb48 ffff88002791fb38 ffffffff8106ceac ffff88002791fb18
 [581674.155260]  ffff880061232dc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581674.155263] Call Trace:
 [581674.155269]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581674.155273]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581674.155275]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581674.155283]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581674.155291]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581674.155294]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581674.155296]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581674.155302]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581674.155306]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581674.155317]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581674.155327]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581674.155336]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581674.155345]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581674.155353]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581674.155362]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581674.155370]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581674.155378]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581674.155389]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [581674.155398]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [581674.155403]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [581674.155404]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [581674.155407]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [581674.155409] ---[ end trace 1853311c87a5cdc6 ]---
 [581779.797314] ------------[ cut here ]------------
 [581779.797336] WARNING: CPU: 0 PID: 10399 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581779.797338] BTRFS: block rsv returned -28
 [581779.797340] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581779.797376] CPU: 0 PID: 10399 Comm: kworker/u30:7 Tainted: G        W     3.15.7-031507-generic #201407281235
 [581779.797378] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581779.797393] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [581779.797395]  0000000000001b22 ffff880100faf958 ffffffff8176f115 0000000000000007
 [581779.797398]  ffff880100faf9a8 ffff880100faf998 ffffffff8106ceac 0000000000000000
 [581779.797401]  ffff88009f068740 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581779.797404] Call Trace:
 [581779.797412]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581779.797416]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581779.797418]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581779.797430]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581779.797441]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581779.797445]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581779.797448]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581779.797457]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581779.797461]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581779.797475]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581779.797487]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581779.797500]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581779.797511]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581779.797522]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581779.797532]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581779.797543]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581779.797553]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581779.797564]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581779.797575]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [581779.797577]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [581779.797588]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [581779.797600]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [581779.797604]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [581779.797608]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [581779.797611]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [581779.797614]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [581779.797617]  [<ffffffff8109bda6>] ? finish_task_switch+0x56/0x180
 [581779.797620]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581779.797624]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [581779.797627]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581779.797629] ---[ end trace 1853311c87a5cdc7 ]---
 [581898.966318] ------------[ cut here ]------------
 [581898.966340] WARNING: CPU: 0 PID: 7064 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581898.966342] BTRFS: block rsv returned -28
 [581898.966343] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581898.966374] CPU: 0 PID: 7064 Comm: kworker/u30:6 Tainted: G        W     3.15.7-031507-generic #201407281235
 [581898.966375] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581898.966391] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [581898.966393]  0000000000001b22 ffff88011891f958 ffffffff8176f115 0000000000000007
 [581898.966396]  ffff88011891f9a8 ffff88011891f998 ffffffff8106ceac 0000000000000000
 [581898.966399]  ffff8800dc246d40 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581898.966402] Call Trace:
 [581898.966410]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581898.966414]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581898.966416]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581898.966427]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581898.966438]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581898.966442]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581898.966444]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581898.966453]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581898.966457]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581898.966471]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581898.966484]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581898.966496]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581898.966508]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581898.966518]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581898.966529]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581898.966539]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581898.966550]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581898.966560]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581898.966571]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [581898.966575]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [581898.966585]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [581898.966598]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [581898.966602]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [581898.966605]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [581898.966609]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [581898.966612]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [581898.966615]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581898.966618]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [581898.966621]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581898.966623] ---[ end trace 1853311c87a5cdc8 ]---
 [581984.178777] ------------[ cut here ]------------
 [581984.178801] WARNING: CPU: 1 PID: 12163 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [581984.178803] BTRFS: block rsv returned -28
 [581984.178805] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [581984.178835] CPU: 1 PID: 12163 Comm: kworker/u30:3 Tainted: G        W     3.15.7-031507-generic #201407281235
 [581984.178837] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [581984.178853] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [581984.178855]  0000000000001b22 ffff88010aff3958 ffffffff8176f115 0000000000000007
 [581984.178858]  ffff88010aff39a8 ffff88010aff3998 ffffffff8106ceac 0000000000000020
 [581984.178861]  ffff8800aa361500 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [581984.178864] Call Trace:
 [581984.178872]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [581984.178877]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [581984.178879]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [581984.178895]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [581984.178909]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [581984.178913]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [581984.178923]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [581984.178928]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [581984.178942]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [581984.178956]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [581984.178970]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [581984.178982]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [581984.178994]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [581984.179005]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [581984.179021]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [581984.179036]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [581984.179048]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [581984.179060]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [581984.179064]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [581984.179076]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [581984.179090]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [581984.179094]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [581984.179098]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [581984.179101]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [581984.179105]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [581984.179108]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581984.179112]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [581984.179115]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [581984.179117] ---[ end trace 1853311c87a5cdc9 ]---
 [582131.865743] ------------[ cut here ]------------
 [582131.865767] WARNING: CPU: 0 PID: 29123 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582131.865769] BTRFS: block rsv returned -28
 [582131.865771] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582131.865802] CPU: 0 PID: 29123 Comm: twsearch.py Tainted: G        W     3.15.7-031507-generic #201407281235
 [582131.865803] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582131.865805]  0000000000001b22 ffff88010de438d8 ffffffff8176f115 0000000000000007
 [582131.865808]  ffff88010de43928 ffff88010de43918 ffffffff8106ceac 0000000100000000
 [582131.865811]  ffff88019f7f0e80 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582131.865814] Call Trace:
 [582131.865822]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582131.865826]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582131.865829]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582131.865839]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582131.865850]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582131.865853]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582131.865856]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582131.865865]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582131.865869]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582131.865883]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582131.865896]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582131.865908]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582131.865920]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582131.865930]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582131.865941]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582131.865951]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582131.865956]  [<ffffffff811c60b9>] ? memcg_check_events+0x29/0x50
 [582131.865960]  [<ffffffff8137760d>] ? cpumask_any_but+0x2d/0x40
 [582131.865971]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582131.865981]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582131.865992]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [582131.866003]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [582131.866006]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [582131.866009]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [582131.866011]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [582131.866015]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [582131.866018]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [582131.866022]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [582131.866025]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [582131.866028]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [582131.866032]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582131.866034] ---[ end trace 1853311c87a5cdca ]---
 [582216.371717] ------------[ cut here ]------------
 [582216.371740] WARNING: CPU: 1 PID: 29754 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582216.371742] BTRFS: block rsv returned -28
 [582216.371743] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582216.371774] CPU: 1 PID: 29754 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582216.371775] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582216.371777]  0000000000001b22 ffff880006dc3af8 ffffffff8176f115 0000000000000007
 [582216.371781]  ffff880006dc3b48 ffff880006dc3b38 ffffffff8106ceac ffff880006dc3b28
 [582216.371783]  ffff8801b0a9a480 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582216.371787] Call Trace:
 [582216.371795]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582216.371799]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582216.371802]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582216.371812]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582216.371823]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582216.371827]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582216.371836]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582216.371840]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582216.371855]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582216.371868]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582216.371881]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582216.371892]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582216.371903]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582216.371914]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582216.371924]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582216.371927]  [<ffffffff8100b1b2>] ? xen_clocksource_read+0x22/0x30
 [582216.371937]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582216.371947]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [582216.371959]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [582216.371964]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [582216.371967]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [582216.371970]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582216.371972] ---[ end trace 1853311c87a5cdcb ]---
 [582282.836801] ------------[ cut here ]------------
 [582282.836819] WARNING: CPU: 1 PID: 1923 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582282.836820] BTRFS: block rsv returned -28
 [582282.836821] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582282.836843] CPU: 1 PID: 1923 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582282.836844] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582282.836846]  0000000000001b22 ffff8801161478d8 ffffffff8176f115 0000000000000007
 [582282.836848]  ffff880116147928 ffff880116147918 ffffffff8106ceac ffffffffa01aa000
 [582282.836850]  ffff8800a7197880 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582282.836853] Call Trace:
 [582282.836860]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582282.836863]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582282.836865]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582282.836873]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582282.836882]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582282.836886]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [582282.836889]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [582282.836896]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582282.836907]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582282.836918]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [582282.836928]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582282.836938]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582282.836946]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582282.836954]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582282.836962]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582282.836971]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582282.836973]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [582282.836983]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [582282.836991]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582282.836999]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582282.837008]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [582282.837016]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [582282.837018]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [582282.837021]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [582282.837023]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [582282.837025]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [582282.837028]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [582282.837030]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [582282.837033]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [582282.837036]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [582282.837039]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [582282.837041]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582282.837043] ---[ end trace 1853311c87a5cdcc ]---
 [582339.018902] ------------[ cut here ]------------
 [582339.018924] WARNING: CPU: 0 PID: 24400 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582339.018926] BTRFS: block rsv returned -28
 [582339.018927] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582339.018957] CPU: 0 PID: 24400 Comm: kworker/u30:9 Tainted: G        W     3.15.7-031507-generic #201407281235
 [582339.018959] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582339.018974] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [582339.018976]  0000000000001b22 ffff88010b667958 ffffffff8176f115 0000000000000007
 [582339.018979]  ffff88010b6679a8 ffff88010b667998 ffffffff8106ceac ffff8801c1f2cb90
 [582339.018982]  ffff88018d2decc0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582339.018985] Call Trace:
 [582339.018992]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582339.018996]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582339.018998]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582339.019009]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582339.019020]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582339.019024]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582339.019026]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582339.019035]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582339.019039]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582339.019053]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582339.019066]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582339.019078]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582339.019090]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582339.019100]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582339.019111]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582339.019121]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582339.019132]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582339.019142]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582339.019154]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [582339.019157]  [<ffffffff8109f586>] ? ttwu_do_activate.constprop.107+0x66/0x70
 [582339.019168]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [582339.019181]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [582339.019185]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [582339.019188]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [582339.019191]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [582339.019194]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [582339.019197]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [582339.019200]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [582339.019203]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [582339.019205] ---[ end trace 1853311c87a5cdcd ]---
 [582421.047776] ------------[ cut here ]------------
 [582421.047795] WARNING: CPU: 1 PID: 31314 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582421.047796] BTRFS: block rsv returned -28
 [582421.047797] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582421.047820] CPU: 1 PID: 31314 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582421.047821] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582421.047822]  0000000000001b22 ffff88010391b8d8 ffffffff8176f115 0000000000000007
 [582421.047824]  ffff88010391b928 ffff88010391b918 ffffffff8106ceac ffffffffa01aa000
 [582421.047826]  ffff88007b694540 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582421.047829] Call Trace:
 [582421.047835]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582421.047839]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582421.047841]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582421.047849]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582421.047857]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582421.047860]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [582421.047864]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [582421.047870]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582421.047882]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582421.047892]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [582421.047902]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582421.047911]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582421.047921]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582421.047933]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582421.047944]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582421.047953]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582421.047955]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [582421.047965]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [582421.047974]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582421.047982]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582421.047990]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [582421.048000]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [582421.048004]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [582421.048008]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [582421.048010]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [582421.048015]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [582421.048019]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [582421.048021]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [582421.048024]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [582421.048027]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [582421.048030]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [582421.048033]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582421.048034] ---[ end trace 1853311c87a5cdce ]---
 [582498.773145] ------------[ cut here ]------------
 [582498.773167] WARNING: CPU: 1 PID: 1139 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582498.773169] BTRFS: block rsv returned -28
 [582498.773170] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582498.773201] CPU: 1 PID: 1139 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582498.773202] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582498.773204]  0000000000001b22 ffff8801031f7af8 ffffffff8176f115 0000000000000007
 [582498.773208]  ffff8801031f7b48 ffff8801031f7b38 ffffffff8106ceac ffff8801031f7b28
 [582498.773211]  ffff8800767b6600 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582498.773214] Call Trace:
 [582498.773221]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582498.773226]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582498.773229]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582498.773239]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582498.773249]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582498.773253]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582498.773262]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582498.773266]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582498.773280]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582498.773293]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582498.773306]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582498.773317]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582498.773330]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582498.773341]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582498.773352]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582498.773355]  [<ffffffff8100b1b2>] ? xen_clocksource_read+0x22/0x30
 [582498.773366]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582498.773376]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [582498.773388]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [582498.773393]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [582498.773396]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [582498.773399]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582498.773401] ---[ end trace 1853311c87a5cdcf ]---
 [582571.252671] ------------[ cut here ]------------
 [582571.252694] WARNING: CPU: 1 PID: 31314 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582571.252697] BTRFS: block rsv returned -28
 [582571.252698] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582571.252729] CPU: 1 PID: 31314 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582571.252731] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582571.252733]  0000000000001b22 ffff88010391b8d8 ffffffff8176f115 0000000000000007
 [582571.252736]  ffff88010391b928 ffff88010391b918 ffffffff8106ceac 0000000100000000
 [582571.252739]  ffff880176813840 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582571.252742] Call Trace:
 [582571.252750]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582571.252757]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582571.252760]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582571.252772]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582571.252783]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582571.252788]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582571.252797]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582571.252814]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582571.252828]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582571.252841]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582571.252854]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582571.252866]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582571.252878]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582571.252890]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582571.252894]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [582571.252908]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [582571.252921]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582571.252933]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582571.252945]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [582571.252957]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [582571.252960]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [582571.252964]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [582571.252966]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [582571.252970]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [582571.252975]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [582571.252978]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [582571.252983]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [582571.252986]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [582571.252990]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [582571.252994]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582571.252996] ---[ end trace 1853311c87a5cdd0 ]---
 [582647.024281] ------------[ cut here ]------------
 [582647.024304] WARNING: CPU: 1 PID: 15639 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582647.024306] BTRFS: block rsv returned -28
 [582647.024307] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582647.024338] CPU: 1 PID: 15639 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582647.024340] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582647.024342]  0000000000001b22 ffff88010c99faf8 ffffffff8176f115 0000000000000007
 [582647.024345]  ffff88010c99fb48 ffff88010c99fb38 ffffffff8106ceac 0000000000000fff
 [582647.024348]  ffff88016da74d00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582647.024351] Call Trace:
 [582647.024359]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582647.024364]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582647.024367]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582647.024378]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582647.024390]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582647.024394]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582647.024399]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [582647.024408]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582647.024427]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582647.024442]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582647.024458]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582647.024475]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582647.024486]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582647.024497]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582647.024509]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582647.024520]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582647.024532]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [582647.024545]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [582647.024551]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [582647.024554]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [582647.024558]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582647.024560] ---[ end trace 1853311c87a5cdd1 ]---
 [582700.982771] ------------[ cut here ]------------
 [582700.982792] WARNING: CPU: 1 PID: 31314 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582700.982795] BTRFS: block rsv returned -28
 [582700.982796] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582700.982828] CPU: 1 PID: 31314 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [582700.982830] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582700.982832]  0000000000001b22 ffff88010391b8d8 ffffffff8176f115 0000000000000007
 [582700.982835]  ffff88010391b928 ffff88010391b918 ffffffff8106ceac ffff88010391b938
 [582700.982838]  ffff8800674cd3c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582700.982841] Call Trace:
 [582700.982849]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582700.982854]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582700.982857]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582700.982869]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582700.982880]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582700.982885]  [<ffffffff815590fb>] ? xennet_tx_buf_gc+0x11b/0x1e0
 [582700.982896]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582700.982911]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582700.982925]  [<ffffffffa010bad1>] ? alloc_extent_state+0x31/0xe0 [btrfs]
 [582700.982938]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582700.982951]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582700.982964]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582700.982976]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582700.982987]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582700.982998]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582700.983002]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [582700.983016]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [582700.983028]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582700.983040]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [582700.983052]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [582700.983064]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [582700.983068]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [582700.983071]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [582700.983074]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [582700.983078]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [582700.983082]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [582700.983085]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [582700.983089]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [582700.983093]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [582700.983096]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [582700.983099]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582700.983101] ---[ end trace 1853311c87a5cdd2 ]---
 [582858.685782] ------------[ cut here ]------------
 [582858.685803] WARNING: CPU: 0 PID: 5961 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582858.685805] BTRFS: block rsv returned -28
 [582858.685807] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582858.685844] CPU: 0 PID: 5961 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [582858.685846] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582858.685848]  0000000000001b22 ffff880113097af8 ffffffff8176f115 0000000000000007
 [582858.685851]  ffff880113097b48 ffff880113097b38 ffffffff8106ceac ffff880100000001
 [582858.685854]  ffff8800922e4680 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582858.685858] Call Trace:
 [582858.685865]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582858.685870]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582858.685873]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582858.685884]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582858.685889]  [<ffffffff81204d70>] ? __wait_on_buffer+0x30/0x30
 [582858.685900]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582858.685904]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582858.685907]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582858.685916]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582858.685920]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582858.685936]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582858.685950]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582858.685964]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582858.685976]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582858.685987]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582858.685999]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582858.686010]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582858.686013]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582858.686024]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582858.686036]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [582858.686048]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [582858.686053]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [582858.686056]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [582858.686059]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582858.686061] ---[ end trace 1853311c87a5cdd3 ]---
 [582940.047063] ------------[ cut here ]------------
 [582940.047086] WARNING: CPU: 0 PID: 6852 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [582940.047088] BTRFS: block rsv returned -28
 [582940.047089] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [582940.047120] CPU: 0 PID: 6852 Comm: flock Tainted: G        W     3.15.7-031507-generic #201407281235
 [582940.047121] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [582940.047123]  0000000000001b22 ffff880107e6fa88 ffffffff8176f115 0000000000000007
 [582940.047127]  ffff880107e6fad8 ffff880107e6fac8 ffffffff8106ceac 0000000100000000
 [582940.047130]  ffff880122cffc00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [582940.047133] Call Trace:
 [582940.047141]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [582940.047145]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [582940.047147]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [582940.047158]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [582940.047169]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [582940.047172]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582940.047176]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [582940.047179]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [582940.047182]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [582940.047191]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [582940.047194]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [582940.047208]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [582940.047221]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [582940.047233]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [582940.047245]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [582940.047256]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [582940.047266]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [582940.047277]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [582940.047288]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [582940.047298]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [582940.047310]  [<ffffffffa0101bb1>] btrfs_release_file+0x71/0xc0 [btrfs]
 [582940.047313]  [<ffffffff811d474d>] __fput+0xbd/0x250
 [582940.047316]  [<ffffffff811d492e>] ____fput+0xe/0x10
 [582940.047320]  [<ffffffff8108df84>] task_work_run+0xc4/0xe0
 [582940.047323]  [<ffffffff8106fb66>] do_exit+0x196/0x470
 [582940.047325]  [<ffffffff81021ee5>] ? syscall_trace_enter+0x165/0x280
 [582940.047328]  [<ffffffff8106fed4>] do_group_exit+0x44/0xa0
 [582940.047331]  [<ffffffff8106ff47>] SyS_exit_group+0x17/0x20
 [582940.047334]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [582940.047336] ---[ end trace 1853311c87a5cdd4 ]---
 [583033.648825] ------------[ cut here ]------------
 [583033.648849] WARNING: CPU: 0 PID: 6901 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583033.648851] BTRFS: block rsv returned -28
 [583033.648852] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583033.648882] CPU: 0 PID: 6901 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [583033.648884] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583033.648886]  0000000000001b22 ffff880107ecfaf8 ffffffff8176f115 0000000000000007
 [583033.648889]  ffff880107ecfb48 ffff880107ecfb38 ffffffff8106ceac ffff880107ecfb28
 [583033.648892]  ffff8801738af580 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583033.648895] Call Trace:
 [583033.648903]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583033.648907]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583033.648910]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583033.648920]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583033.648931]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583033.648935]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583033.648938]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583033.648946]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583033.648950]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583033.648964]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583033.648977]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583033.648989]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583033.649001]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583033.649012]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583033.649022]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583033.649033]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583033.649035]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583033.649045]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583033.649056]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [583033.649067]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [583033.649072]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [583033.649075]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [583033.649078]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583033.649080] ---[ end trace 1853311c87a5cdd5 ]---
 [583113.009095] ------------[ cut here ]------------
 [583113.009118] WARNING: CPU: 0 PID: 10399 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583113.009120] BTRFS: block rsv returned -28
 [583113.009121] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583113.009144] CPU: 0 PID: 10399 Comm: kworker/u30:7 Tainted: G        W     3.15.7-031507-generic #201407281235
 [583113.009145] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583113.009156] Workqueue: btrfs-endio-write normal_work_helper [btrfs]
 [583113.009158]  0000000000001b22 ffff880100faf958 ffffffff8176f115 0000000000000007
 [583113.009160]  ffff880100faf9a8 ffff880100faf998 ffffffff8106ceac 0000000000000020
 [583113.009163]  ffff8800da49a640 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583113.009165] Call Trace:
 [583113.009170]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583113.009173]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583113.009175]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583113.009183]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583113.009192]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583113.009194]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583113.009196]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583113.009203]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583113.009206]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583113.009217]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583113.009226]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583113.009235]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583113.009244]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583113.009252]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583113.009260]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583113.009268]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583113.009277]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583113.009284]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583113.009293]  [<ffffffffa00faaa2>] btrfs_finish_ordered_io+0x2a2/0x500 [btrfs]
 [583113.009295]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [583113.009304]  [<ffffffffa00fad15>] finish_ordered_fn+0x15/0x20 [btrfs]
 [583113.009313]  [<ffffffffa011fbc9>] normal_work_helper+0x79/0x1b0 [btrfs]
 [583113.009316]  [<ffffffff810893ef>] process_one_work+0x17f/0x4c0
 [583113.009319]  [<ffffffff8108a60b>] worker_thread+0x11b/0x3d0
 [583113.009321]  [<ffffffff8108a4f0>] ? manage_workers.isra.21+0x190/0x190
 [583113.009323]  [<ffffffff81091469>] kthread+0xc9/0xe0
 [583113.009326]  [<ffffffff8109bda6>] ? finish_task_switch+0x56/0x180
 [583113.009328]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [583113.009331]  [<ffffffff817855fc>] ret_from_fork+0x7c/0xb0
 [583113.009333]  [<ffffffff810913a0>] ? flush_kthread_worker+0xb0/0xb0
 [583113.009334] ---[ end trace 1853311c87a5cdd6 ]---
 [583202.917579] ------------[ cut here ]------------
 [583202.917602] WARNING: CPU: 1 PID: 5561 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583202.917604] BTRFS: block rsv returned -28
 [583202.917605] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583202.917638] CPU: 1 PID: 5561 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [583202.917640] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583202.917642]  0000000000001b22 ffff8800027f78d8 ffffffff8176f115 0000000000000007
 [583202.917645]  ffff8800027f7928 ffff8800027f7918 ffffffff8106ceac ffff8800027f78e8
 [583202.917648]  ffff88009a49d900 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583202.917652] Call Trace:
 [583202.917659]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583202.917664]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583202.917667]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583202.917678]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583202.917690]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583202.917694]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583202.917697]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [583202.917701]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [583202.917704]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583202.917714]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583202.917717]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583202.917733]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583202.917747]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583202.917760]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583202.917772]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583202.917784]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583202.917796]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583202.917807]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583202.917810]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583202.917822]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583202.917833]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583202.917845]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583202.917856]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583202.917860]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583202.917863]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583202.917866]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583202.917869]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583202.917873]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583202.917877]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583202.917881]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583202.917885]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583202.917888]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583202.917892]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583202.917894] ---[ end trace 1853311c87a5cdd7 ]---
 [583259.647131] ------------[ cut here ]------------
 [583259.647150] WARNING: CPU: 0 PID: 5561 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583259.647151] BTRFS: block rsv returned -28
 [583259.647152] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583259.647174] CPU: 0 PID: 5561 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [583259.647175] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583259.647177]  0000000000001b22 ffff8800027f78d8 ffffffff8176f115 0000000000000007
 [583259.647179]  ffff8800027f7928 ffff8800027f7918 ffffffff8106ceac ffff8801e4472780
 [583259.647181]  ffff8801e13afd00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583259.647183] Call Trace:
 [583259.647190]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583259.647193]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583259.647195]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583259.647203]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583259.647211]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583259.647215]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [583259.647218]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [583259.647225]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583259.647236]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583259.647246]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583259.647255]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583259.647264]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583259.647273]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583259.647281]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583259.647289]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583259.647291]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583259.647299]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583259.647307]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583259.647316]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583259.647324]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583259.647326]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583259.647329]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583259.647330]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583259.647333]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583259.647336]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583259.647338]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583259.647341]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583259.647344]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583259.647346]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583259.647349]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583259.647350] ---[ end trace 1853311c87a5cdd8 ]---
 [583346.644739] ------------[ cut here ]------------
 [583346.644758] WARNING: CPU: 0 PID: 5561 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583346.644759] BTRFS: block rsv returned -28
 [583346.644760] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583346.644783] CPU: 0 PID: 5561 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [583346.644784] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583346.644786]  0000000000001b22 ffff8800027f78d8 ffffffff8176f115 0000000000000007
 [583346.644788]  ffff8800027f7928 ffff8800027f7918 ffffffff8106ceac ffff8800027f78e8
 [583346.644790]  ffff88018e0d0340 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583346.644792] Call Trace:
 [583346.644799]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583346.644803]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583346.644804]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583346.644812]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583346.644822]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583346.644840]  [<ffffffff81652e8d>] ? consume_skb+0x3d/0xb0
 [583346.644843]  [<ffffffff8137d17d>] ? radix_tree_lookup+0xd/0x10
 [583346.644850]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583346.644862]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583346.644871]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583346.644881]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583346.644891]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583346.644909]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583346.644917]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583346.644925]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583346.644928]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583346.644936]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583346.644944]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583346.644953]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583346.644961]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583346.644964]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583346.644966]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583346.644968]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583346.644970]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583346.644974]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583346.644976]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583346.644979]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583346.644982]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583346.644984]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583346.644987]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583346.644988] ---[ end trace 1853311c87a5cdd9 ]---
 [583424.600029] ------------[ cut here ]------------
 [583424.600049] WARNING: CPU: 0 PID: 5561 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583424.600123] BTRFS: block rsv returned -28
 [583424.600125] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583424.600154] CPU: 0 PID: 5561 Comm: ruby Tainted: G        W     3.15.7-031507-generic #201407281235
 [583424.600155] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583424.600157]  0000000000001b22 ffff8800027f78d8 ffffffff8176f115 0000000000000007
 [583424.600160]  ffff8800027f7928 ffff8800027f7918 ffffffff8106ceac ffff8800027f78e8
 [583424.600163]  ffff8801ce5246c0 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583424.600166] Call Trace:
 [583424.600176]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583424.600218]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583424.600220]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583424.600230]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583424.600238]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583424.600245]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583424.600256]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583424.600266]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583424.600276]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583424.600285]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583424.600294]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583424.600302]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583424.600310]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583424.600313]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583424.600316]  [<ffffffff811c88c1>] ? mem_cgroup_try_charge+0x161/0x230
 [583424.600325]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583424.600333]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583424.600341]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583424.600349]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583424.600352]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583424.600354]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583424.600356]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583424.600358]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583424.600361]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583424.600364]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583424.600366]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583424.600369]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583424.600372]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583424.600374]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583424.600376] ---[ end trace 1853311c87a5cdda ]---
 [583508.950748] ------------[ cut here ]------------
 [583508.950770] WARNING: CPU: 1 PID: 13389 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583508.950772] BTRFS: block rsv returned -28
 [583508.950773] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583508.950803] CPU: 1 PID: 13389 Comm: twsearch.py Tainted: G        W     3.15.7-031507-generic #201407281235
 [583508.950805] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583508.950808]  0000000000001b22 ffff88000544b8d8 ffffffff8176f115 0000000000000007
 [583508.950811]  ffff88000544b928 ffff88000544b918 ffffffff8106ceac ffff8801e70e7200
 [583508.950814]  ffff8800b414c380 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583508.950817] Call Trace:
 [583508.950825]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583508.950830]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583508.950833]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583508.950845]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583508.950850]  [<ffffffff8117cf99>] ? __mod_zone_page_state+0x49/0x50
 [583508.950864]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583508.950868]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583508.950871]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583508.950882]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583508.950887]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583508.950902]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583508.950916]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583508.950930]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583508.950943]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583508.950955]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583508.950966]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583508.950980]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583508.950985]  [<ffffffff811c60b9>] ? memcg_check_events+0x29/0x50
 [583508.950992]  [<ffffffff8137760d>] ? cpumask_any_but+0x2d/0x40
 [583508.951007]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583508.951018]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583508.951030]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583508.951042]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583508.951046]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583508.951049]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583508.951052]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583508.951055]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583508.951059]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583508.951063]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583508.951067]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583508.951071]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583508.951075]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583508.951077] ---[ end trace 1853311c87a5cddb ]---
 [583608.165808] ------------[ cut here ]------------
 [583608.165831] WARNING: CPU: 1 PID: 5871 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583608.165834] BTRFS: block rsv returned -28
 [583608.165835] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583608.165866] CPU: 1 PID: 5871 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [583608.165868] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583608.165870]  0000000000001b22 ffff880113f9f8d8 ffffffff8176f115 0000000000000007
 [583608.165873]  ffff880113f9f928 ffff880113f9f918 ffffffff8106ceac 0000000100000000
 [583608.165877]  ffff8801bff37e00 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583608.165880] Call Trace:
 [583608.165888]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583608.165893]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583608.165896]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583608.165911]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583608.165925]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583608.165929]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583608.165932]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583608.165942]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583608.165946]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583608.165962]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583608.165977]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583608.165991]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583608.166004]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583608.166017]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583608.166032]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583608.166043]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583608.166047]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583608.166061]  [<ffffffffa010d383>] ? clear_extent_bit+0x1b3/0x370 [btrfs]
 [583608.166073]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583608.166085]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583608.166096]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583608.166108]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583608.166112]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583608.166115]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583608.166118]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583608.166122]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583608.166126]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583608.166129]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583608.166134]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583608.166138]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583608.166141]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583608.166145]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583608.166147] ---[ end trace 1853311c87a5cddc ]---
 [583725.123905] ------------[ cut here ]------------
 [583725.123927] WARNING: CPU: 0 PID: 828 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583725.123930] BTRFS: block rsv returned -28
 [583725.123931] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583725.123961] CPU: 0 PID: 828 Comm: python Tainted: G        W     3.15.7-031507-generic #201407281235
 [583725.123963] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583725.123965]  0000000000001b22 ffff8801006938d8 ffffffff8176f115 0000000000000007
 [583725.123968]  ffff880100693928 ffff880100693918 ffffffff8106ceac 0000000100000000
 [583725.123971]  ffff880045e07b80 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583725.123975] Call Trace:
 [583725.123984]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583725.123989]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583725.123991]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583725.124003]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583725.124015]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583725.124019]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583725.124024]  [<ffffffff8101c7b9>] ? sched_clock+0x9/0x10
 [583725.124028]  [<ffffffff810a4e05>] ? sched_clock_local+0x25/0x90
 [583725.124031]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583725.124041]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583725.124044]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583725.124063]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583725.124096]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583725.124110]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583725.124123]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583725.124137]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583725.124152]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583725.124168]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583725.124176]  [<ffffffff81768073>] ? check_acl+0x28/0x9a
 [583725.124180]  [<ffffffff810cd46e>] ? irq_get_irq_data+0xe/0x10
 [583725.124191]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583725.124203]  [<ffffffffa00f19a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
 [583725.124215]  [<ffffffffa00f7fa8>] btrfs_dirty_inode+0x58/0xe0 [btrfs]
 [583725.124225]  [<ffffffffa00f8095>] btrfs_update_time+0x65/0xc0 [btrfs]
 [583725.124229]  [<ffffffff810711c6>] ? current_fs_time+0x16/0x60
 [583725.124232]  [<ffffffff811ed355>] update_time+0x25/0xc0
 [583725.124234]  [<ffffffff811ed651>] touch_atime+0x161/0x170
 [583725.124238]  [<ffffffff8115f9eb>] do_generic_file_read+0x3db/0x480
 [583725.124243]  [<ffffffff811ddef0>] ? getname_flags.part.18+0x30/0x140
 [583725.124246]  [<ffffffff81160aa4>] generic_file_aio_read+0x174/0x1b0
 [583725.124251]  [<ffffffff811d22da>] do_sync_read+0x5a/0x90
 [583725.124255]  [<ffffffff811d34b1>] vfs_read+0xb1/0x180
 [583725.124258]  [<ffffffff811d372f>] SyS_read+0x4f/0xb0
 [583725.124262]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583725.124264] ---[ end trace 1853311c87a5cddd ]---
 [583891.401371] ------------[ cut here ]------------
 [583891.401396] WARNING: CPU: 1 PID: 17863 at /home/apw/COD/linux/fs/btrfs/extent-tree.c:6946 use_block_rsv+0xfd/0x1a0 [btrfs]()
 [583891.401398] BTRFS: block rsv returned -28
 [583891.401400] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c softdog tcp_diag inet_diag dm_crypt ppdev xen_fbfront fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_piix4 serio_raw parport_pc parport mac_hid isofs xt_tcpudp iptable_filter xt_owner ip_tables x_tables btrfs xor raid6_pq crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
 [583891.401430] CPU: 1 PID: 17863 Comm: twsearch.py Tainted: G        W     3.15.7-031507-generic #201407281235
 [583891.401432] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
 [583891.401434]  0000000000001b22 ffff880115877af8 ffffffff8176f115 0000000000000007
 [583891.401437]  ffff880115877b48 ffff880115877b38 ffffffff8106ceac 0000000100000000
 [583891.401440]  ffff8801cf166740 ffff8801aedcd800 0000000000001000 ffff88001c987000
 [583891.401444] Call Trace:
 [583891.401452]  [<ffffffff8176f115>] dump_stack+0x46/0x58
 [583891.401456]  [<ffffffff8106ceac>] warn_slowpath_common+0x8c/0xc0
 [583891.401459]  [<ffffffff8106cf96>] warn_slowpath_fmt+0x46/0x50
 [583891.401471]  [<ffffffffa00d9d1d>] use_block_rsv+0xfd/0x1a0 [btrfs]
 [583891.401482]  [<ffffffffa00de687>] btrfs_alloc_free_block+0x57/0x220 [btrfs]
 [583891.401487]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583891.401490]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583891.401499]  [<ffffffffa00c8a3c>] btrfs_copy_root+0xfc/0x2b0 [btrfs]
 [583891.401504]  [<ffffffff810a5cea>] ? arch_vtime_task_switch+0x8a/0x90
 [583891.401520]  [<ffffffffa013a583>] ? create_reloc_root+0x33/0x2c0 [btrfs]
 [583891.401534]  [<ffffffffa013a743>] create_reloc_root+0x1f3/0x2c0 [btrfs]
 [583891.401548]  [<ffffffffa0140eb8>] btrfs_init_reloc_root+0xb8/0xd0 [btrfs]
 [583891.401560]  [<ffffffffa00ee967>] record_root_in_trans.part.30+0x97/0x100 [btrfs]
 [583891.401573]  [<ffffffffa00ee9f4>] record_root_in_trans+0x24/0x30 [btrfs]
 [583891.401585]  [<ffffffffa00efeb1>] btrfs_record_root_in_trans+0x51/0x80 [btrfs]
 [583891.401597]  [<ffffffffa00f13d6>] start_transaction.part.35+0x86/0x560 [btrfs]
 [583891.401600]  [<ffffffff8100b1b0>] ? xen_clocksource_read+0x20/0x30
 [583891.401612]  [<ffffffffa00f18d9>] start_transaction+0x29/0x30 [btrfs]
 [583891.401624]  [<ffffffffa00f1c1b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
 [583891.401637]  [<ffffffffa01019a1>] btrfs_sync_file+0x171/0x310 [btrfs]
 [583891.401642]  [<ffffffff81202945>] do_fsync+0x55/0x80
 [583891.401645]  [<ffffffff81202d10>] SyS_fsync+0x10/0x20
 [583891.401649]  [<ffffffff817858bf>] tracesys+0xe1/0xe6
 [583891.401652] ---[ end trace 1853311c87a5cdde ]---
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